Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh23a1153p&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SH23A-1153
Physics
2149 Mhd Waves And Turbulence (2752, 6050, 7836), 2159 Plasma Waves And Turbulence, 2164 Solar Wind Plasma, 7863 Turbulence (4490)
Scientific paper
The nature of the spectral break in the solar wind at the ion inertial scales is one of the unanswered questions in solar wind physics because of the limitations of in situ measurements and limitations of MHD models to explore dynamics at ion inertial length scales. We study a simple system which gives us insight into dissipation processes at these length scales as a first step to answer this question. We study the dissipation processes in a turbulent plasma, set up as an Orszag-Tang vortex in a hybrid code. We do not include any explicit dissipation terms such as, viscosity or resistivity. Clear evidence of dissipation is seen in magnetic and bulk flow energies. We study the time evolution of the energy in different channels in an attempt to quantify the dissipation in our system. In the turbulent regime, the energy is seen to dissipate mostly through the magnetic channel and the bulk of the dissipated energy goes into perpendicular heating of the ions.
Cassak Paul A.
Matthaeus William H.
Parashar T. N.
Shay Michael A.
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